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Vehicle control system

a technology of vehicle control and control system, applied in the direction of electrical control, hybrid vehicles, instruments, etc., can solve the problems of a method of compensating for the cooling performance drop, and achieve the effect of reducing the fuel consumption rate, reducing noise and vibration, and increasing the priority of fuel consumption

Active Publication Date: 2013-11-19
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The patent describes a system for controlling an internal combustion engine in a feedback manner based on the temperature of the engine's coolant. This helps to improve the engine's efficiency during stops and to reduce the amount of heat emitted during continued operation. Additionally, the system can vary the engine's operating state to reduce noise and vibration during vehicle operation, while prioritizing fuel consumption rate to minimize fuel consumption. Overall, this system helps to optimize engine performance and reduce fuel consumption.

Problems solved by technology

However, JP-A-2-142329 describes nothing about a method of compensating for decreased cooling performance.

Method used

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Embodiment Construction

[0031]Hereinafter, an embodiment of the invention will be described with reference to the accompanying drawings. In the following description, like reference numerals denote the same components. The names and functions of them are also the same. Therefore, the detailed description thereof will not be repeated.

[0032]As shown in FIG. 1, a plug-in hybrid vehicle includes an engine 100, a first motor generator (MG) 110, a second motor generator (MG) 120, a power split mechanism 130, a reduction gear 140 and a battery 150. The plug-in hybrid vehicle according to the present embodiment is equipped with the engine 100 and an electric motor (second MG 120) as driving sources.

[0033]The engine 100, the first MG 110, the second MG 120 and the battery 150 are controlled by an electronic control unit (ECU) 170. Note that the ECU 170 may be divided into a plurality of ECUs.

[0034]The vehicle runs by driving force from at least any one of the engine 100 and the second MG 120. That is, any one of or...

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Abstract

A control system for a vehicle that is equipped with an internal combustion engine and a generator driven by the internal combustion engine to generate electric power and that is able to supply an external device with electric power generated by the generator during a stop of the vehicle includes: a detecting unit that detects a coolant temperature of the internal combustion engine; and an efficiency control unit that controls the internal combustion engine so that, during a stop of the vehicle, an operating state of the internal combustion engine approaches an operating state where an efficiency of the internal combustion engine becomes a predetermined efficiency as a difference between the coolant temperature and a predetermined upper limit temperature increases.

Description

INCORPORATION BY REFERENCE[0001]The disclosure of Japanese Patent Application No. 2009-280161 filed on Dec. 10, 2009 including the specification, drawings and abstract is incorporated herein by reference in its entirety.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to a vehicle control system and, more specifically, to a technique for controlling an internal combustion engine when electric power generated using the power of the internal combustion engine is supplied to a device outside a vehicle during a vehicle stop.[0004]2. Description of the Related Art[0005]There is known a hybrid vehicle that is equipped with an internal combustion engine and an electric motor and that is able to run by driving force from at least one of the internal combustion engine and the electric motor. The hybrid vehicle is able to generate electric power by an electric motor or a generator using power from the internal combustion engine. Generated electric power is...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): F02B63/00H02P9/10F02D41/00B60L50/16B60W30/18
CPCB60K6/445B60W10/06B60W10/08B60W30/18054B60L2240/445B60W20/00Y02T10/6239Y02T10/6269Y02T10/6286Y02T10/62B60W2510/0676B60W20/15
Inventor NIIMI, KUNIAKI
Owner TOYOTA JIDOSHA KK